SOLUTION: You must be at a meeting in a city 630 miles away in 8 hours and 45 minutes, what should be your average speed?

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Question 793928: You must be at a meeting in a city 630 miles away in 8 hours and 45 minutes, what should be your average speed?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
8 hours, 45 minutes = 8 hr + 45 min

8 hours, 45 minutes = 8 hr + 45/60 hr

8 hours, 45 minutes = 8 hr + 0.75 hr

8 hours, 45 minutes = 8.75 hours

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d = rt

630 = r*8.75

630/8.75 = r

72 = r

r = 72

So you need to travel 72 miles per hour

Note: this average speed is unrealistic (even on the highway in most places), so ideally you should plan accordingly and stretch out that time limit.